Seam for woven-wire belts



Aug. M, 192s..

H. LINDSAY SEAM FR WOVEN WIRE BELTS Filed DeG. 18. 1922 2 Sheets-Sheet 2 m aww SQ@ *EY 79M; @Kvk/ma,

Patented Aug. lli, i923.

HAIdILTN LINDSAY,

a t; nin L., .mewhwn GF CLEVELAND, GEIO, .FASSIGNOBJ TO THE LINDSAY WIRE Application filed :December 1S, 1922. Serial No. 607,557.

To all whom t may concern.'

Be it known that l, HAMILToN LrNDsAY, a citizen of the llnited States, residing at Cleveland, in the county of Cuyahoga and 5 State of Ohio, have invented a certain newV and useful improvement in a Seam for lVoven-VVii-e Belts, of which the following' isla full, clear, and exact description, reference being` had to the accompanying drawings. 1

lThis invention relates to a method of joining' the endsof a wire fabric to form an; endless belt which is particularly useful.

inY Fourdrinier paper machines. More particularly, my invention is concerned with. a seamA for lacing` the ends of a belt hav-V ing a special weave as set forth 1n my co'-` pending application, Serial No.- 525,403, filed Dec. 28, 1921.

Briefly, the belt illustrated in my co-` pending' application 'embodies a fabric wherein the lower knuckles of the longh.

tudinally extending or warp wires pass continuously beneath two or more cross or lay wires instead of only one. Accordingly, the warp wires are divided into groups, each preferably of three wires in number, during the weaving operation, and are manipulated so that one lgroup forms one plane of the shed while the other two groups form the other plane of the shed, while the shuttle passes therebetween and across the loom..

These `groups are interchanged after each stroke of the shuttle whereby the fabric so side of the belt and long knuckles' on the lower side thereof. This results in a con?,

struction which gives a longer wearing surface to the under side of the belt, thus iin-- 40 creasing` the life thereof.

One of the difficulties encountered in joining the ends of the belt above described is the provision of a seam which does not fill the intersticcs (which would render it difficult for water to pass through this seam when the belt is in use) and at the same time forms a su-ilicient support between the i formed has shortknuckles on the upper sul'licient space for the passage of` water therethrough, and suflicient support between the ends of thefabric so that the pulp is'properly drained and at the same time supported adjacent the seam, whereby the paper is not weakened. Another object Ais the provision of aseam for usc in a belt constructed in the manner above set forth which will not weaken the wires adjacent the ends of the fabric. Furthermore, my invention includes a seam, the wires of which lie in substantially the same plane as the warp wires so that the wear occasioned by the passage of the seam across a suction box is not greater than that occurring on other parts of the belt.

The preferred embodiment for carrying out my invention is illustrated in connection with the accompanying drawings, and

is hereinafter described in detail. The essential features are summarized in the claims.

bottom side thereof; Figs. 3 and 4L- are viewsV similar to Figs. l and 2 and show the application of a second stitching wire; Figs. 5 and 6 are views corresponding' to Figs. 3 and l with the application of a closing` wire; while Figs. .7, 8, and 9 are sections taken on the corresponding; lines in'Fig-s. l, 3 and 5 respectively.

As shownin Figs, lite 6, A indicates the longitudinal or warp wires of the fabric and B the transverse or lay wires. In Figs. 7 to 9, the foremost warp wire A1 passes over the transverse wire B1 thence beneath two transverse wires B2 and B3, over the wire Bt, and thence beneath the next two transverse wires of which one only is shown Cri Y ing a trated as being,` on one end of the belt. The corresponding transverse wires on the opi posite end of the beltare indicated as BB1, BB2, BB3, BB1, and B135 respectively.

The described construction is illustrated by reference characters, particularly in the upper half of Fig. l, but the Weave is the same for all figures illustrated. vWith this construction then, the fourth vvarp ivire would correspond to the ivire r3.1; the fifth to the Wire A2, etc., whereupon the lay Wires lie, alternately over tivo and beneath one Warp Wire, etc.

rlhe fabric shoivn and described thus has on its under side a series of long` longitudinal knuckles, in contradistinction to the short or abrupt knuckles on the upper side. ccordinglv every third warp ivire adjacent the same lay ivire has a short knuckle on the upper side, as is shown particularly in 1Eig. 1, wherein the Y-.vire B3 has short knuckles on the top side indicated at 1U to 14. etc. Simi larly, the ivire B2, on the top side of the fabric, has short knuckles. each positioned one Warp Wire to the left of those forming the short knuckles over the ivire B3. Accordingly, the short knuckles for the ivire B2 are indicated at 16 to 19, etc.

rlfhe shortknuckles 10 to lei and 1G to i9 above referred to are shown in the various figures as being located on the upper region of the belt. The corresponding short knuckles on the lovver region of the belt are indi cated at 10 to 13 d also at 16 to 20 respectively.

My in Tention. as heretofore stated7 embodies a seam for closing the ends of a belt hav- Weave as heretofore described. To this end7 f have shown in Figs. 1 and 2 the first step in forming the seam as embodying stitching ivires S and fil which extend over the ends of the fabric and on opposite sides thereof to form loops for receiving the closing Wires as will be hereinafter described.`

Each stitching wire is carried back at the end of the belt a distance of one or more lay wires, whereby the stresses on the closing wire incident to the tension on the belt during operation will not pull the lay threadsJ out of the fabric. Accordingly, I

have shown a stitching wire S in Fig. 1 as j passing over the lay wire B3 and to the left of the short Aknuckles l() to lli. rfhis brings the inner loops of the stitching Wire over a lay Wire which is held in position on one side by the short knuckles 10 to 1d and on the other side by the shortknuckles 16 to 20 which, as heretofore stated, are over the next lay Wire toward the end of the belt. In this vvay, the lay Wire is not distorted when tension is placed upon the belt. The outer loops of the stitching ivire S are shoivn as passing around the lay wir B1 and in such position as to avoid the knuckles on the top and bottom sides of the fabric adjacent the with, and at the ends thereof. Thus the stitching wire lies substantially in the same plane as the Warp Wires vvhereby undue wear on the stitchingl wire, such as occasioned by the travel of a belt over the suction bor: in paper machines., is materially prevented. Accordingly, the stitching .vire is threaded through every third roiv and the outer Vloop occurs in a roiv adjacent to the row in which an inner loop occurs. rhe Weave of the stitching Wire is employed in the saine manner on both ends of the belt.

In Figs. 3 and Ll, I have shoivn the next step in the making of a seam, namely, the Weaving of a second stitching` .vire S2 and T his stitching ivire, however, also passes preferably through every third roiv and over the same lay Wire but in rows different from those through which the first stitching Wires extend. The second stitching vrire thus forms a set of outer loops in royvs different froin those occupied by the lirst stitching Wire but the inner Vloops of the second stitching Wire occur in the same rou' as the outer loops on the first stitching Wire. This prevents the crossing of Vone stitching Wire over another adjacent a short knuckle and thus minimizes the Wear occasioned by the travel of the belt across the suction boxes. By placing the inner loops of the second stitching vire over a lay ivire different from those over which the first stitching ivire extends, l may still position the second stitching Wire adjacent short knuckles as heretofore described for the iirst stitching Wire.

To close the belt, l provide single closing ivire C. rfhis closing Wire extends from one end of the belt to the other end and alternately betiveen outer loops of the tivo sets of stitching ivires. rin important consideration in the formation of the seam is the provision of sufficient support for that per tion of the pulp adjacent the seam. Accor-lingly, a single closing ivire joining the alternate loops formed by tivo stitching Wires provides a mesh substantially the same as the continuation of the Warp Wires. Moreover, as shown in Figs. 5 and 6, the closing Wires on the under side of the belt are approximately parallel to the ivarp Wires, whereby the Wear on the under side of .the belt is reduced to a minimum.

A seam constructed according to my invention transmits the operating stresses to lay Wires remote from the ends of the belt and at the same time provides an anchorage adjacent short knuckles, whereby movement or displacement of any lay Wire is prevent.n ed. The proper drainage is not interfered same time the pulp is properly supported. A further feature set forth by my invention is the positioning of the stitching and closing Wires so as to maintain the wires forming the seam Within the same CII CII

'forming loops adjacent plane as .the warp wires. In this way, the wear on the seam and cloth is substantially uniform. Y

I claim:

l. A seam for an endless belt wherein the weave comprises i,varp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on-the other side thereof, havingtwo stitching wires passing through one end ofthe belt, at least one ofthe wires passing throughthe belt adjacent a short warp knuckle and the end ofthe belt, and a closing wire connecting said loops.

2. A seam for an endless belt wherein the #eave comprises warp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on the Other side thereof, having two stitching wires adjacent one end of the belt, one of the stitching wires passing through the belt adjacent a. short knuckle and forming loops adjacent the ends of the belt, and a closing wire passing through said loops for joining the ends of the belt.

3. A seam for an endless belt wherein the weave comprises warp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching Wires at one end of the belt, each of said wires passing through the belt adjacent a short warp knuckle, and a closing wire passing alternately through said loops and joining the ends of the belt.

4. A seam for an endless belt wherein the 'wea-ve comprises warp wires and'lay wires,

the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent one end of the belt, the stitching wires forming outer loops over the same lay wire and forming inner loops over diiferent lay wires, at least one of the'stitching wires passing` through the belt adjacent a short warp knuckle, and a closing wire passing alternately through said loops and joining the ends of the belt. j

5. A seam for an endless belt wherein the weave comprises warp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on theV other side thereof, havingv two stitching wires passing` through one end of the belt and adjacent different rows to form outer loops, one of said stitching wires passing through the belt so as to form inner loops, each inner loop passing over aV lay wire which has a short'warp knuckle adjacent said loop, and a closing wire passing alternately through said outer loops for joining the ends of the belt.

6. A seam for an endless belt wherein the weave comprises warp wires and lay wires,

wires threaded through one end of the belt so as to form outer loops over the same lay vwire and to forni inner loops over differentv lay wires, the inner loop of one wire occupying the saine row as the outer loop of 'he other wire.v said stitching wires passing through the belt over inner lay wires, 'the warp wire on one side of the stitching wires forming a-short warp knuckle over said lay wires, and that on the other side forming a short warp knuckle over the next lay wire toward the end of the belt, and a closing wire passing through some of said loops and joining the ends of the belt.

7. A seam for an endless belt wherein the weave comprises warp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having` two stitching wires and a closing wire, one of said stitching wires extending over a lay wire remote from the end of the belt, the warp wire on one side of the stitching wire having a short warp knuckle adjacent to the lay wire, and the warp wire on the other side of the stitching wire forming a short knuckle on the adjacent lay wire.

8. A seam for an endless belt wherein the weave comprises warp wires and lay wires, the warp wires having long knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires adjacent one end of the belt., each of said stitching wires passing through the belt over different lay wires, and each of said wires having a short warp knuckle adjacent said stitching` wires, at least one of said stitching wires being` passed around the end ofthe belt to form loops. and a closing wire extending across the ends of the belt and passing through said loops.

9. A seam for an endless belt wherein the weave comprises warp wires and lay wires, the warp wires having long` knuckles on one side of the belt and short knuckles on the other side thereof, having two stitching wires passing around theend of the belt to form outer and inner loops, the outer loops occupying diiferent rows and the inner loops passing over lay w` es in such position that a short warp knuckle passes over the lay wire adjacent said stitching` wire, and a closing wire extending across the end of the belt and passing through the loops in one of the stitching wires.

l0. A seam for an endless belt wherein the weave vcomprises warp wires and lay wires, the warn wires having long knuckles Von one side of the belt and short knuckles on the other side thereof, having two stitclr ing wires adjacent one end of the belt, said stitching Wires forming outer loops over the snme'lay Wire und inner loops over different lay wires, all et the inner loops of one stitchj Y A'er locos joiningI the ends of the belt.

the Weave comprises Warp Wires and lay wires, the Werp Wires having long'lznuckles on one side of the )belt and'short knuckles on the other side thereo'lluwing two stitching Wires passing' over one encl of the 1oelt so 'es te provide outer and inner loops, each inner loop being positioned on every third row in-@l adjacent :i short warp knuckle, and ai closing- Wire passing across the ends of the L I i seein or un endless belt wherein belt and passing through the outer loops in one ol the stitching wires.

12. :l senin for an endless belt wherein the Weave comprises VWarp Wires und ley Wires, the werp Wines having longknuckles on one side ofthe belt and short knuckles on the other side thereof, lla-ving two stitching wires adjacent each enel of' the helt, each Vstitching` Wire :forming outer loops over the end or" tne belt and inner loopsovei' an inner ley wire :incl zic-ent a short Warp knuckle, and a` closing Wire passing alternately through the outer loops on each enel of the belt.

ln testimony whereof, l hereunto my si gnature.

HAMILTON LINDSAY. 

